無由 [无－]

Jyutping mou4 jau4
Pinyin wú yóu

Definitions (CC-CEDICT)
  1. to be unable (to do sth)
  2. no reason to ...
  3. without rhyme or reason
Definitions (Wiktionary)
  1. adv, literary
    to have no way of; to not be in a position to
    (syn.) 无从, 無從
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）